163 lines
4.9 KiB
Python
163 lines
4.9 KiB
Python
"""
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This example will access an API, grab a number like hackaday skulls, github
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stars, price of bitcoin, twitter followers... if you can find something that
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spits out JSON data, we can display it!
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"""
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import gc
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import time
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import board
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import busio
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import neopixel
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from digitalio import DigitalInOut
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from digitalio import Direction
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import adafruit_espatcontrol.adafruit_espatcontrol_socket as socket
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from adafruit_espatcontrol import adafruit_espatcontrol
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from adafruit_ht16k33 import segments
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import adafruit_requests as requests
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# Get wifi details and more from a secrets.py file
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try:
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from secrets import secrets
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except ImportError:
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print("WiFi secrets are kept in secrets.py, please add them there!")
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raise
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# CONFIGURATION
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PLAY_SOUND_ON_CHANGE = False
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NEOPIXELS_ON_CHANGE = False
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TIME_BETWEEN_QUERY = 60 # in seconds
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# Some data sources and JSON locations to try out
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# Bitcoin value in USD
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DATA_SOURCE = "http://api.coindesk.com/v1/bpi/currentprice.json"
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DATA_LOCATION = ["bpi", "USD", "rate_float"]
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# Github stars! You can query 1ce a minute without an API key token
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#DATA_SOURCE = "https://api.github.com/repos/adafruit/circuitpython"
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#if 'github_token' in secrets:
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# DATA_SOURCE += "?access_token="+secrets['github_token']
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#DATA_LOCATION = ["stargazers_count"]
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# Youtube stats
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#CHANNEL_ID = "UCpOlOeQjj7EsVnDh3zuCgsA" # this isn't a secret but you have to look it up
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#DATA_SOURCE = "https://www.googleapis.com/youtube/v3/channels/?part=statistics&id=" \
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# + CHANNEL_ID +"&key="+secrets['youtube_token']
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# try also 'viewCount' or 'videoCount
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#DATA_LOCATION = ["items", 0, "statistics", "subscriberCount"]
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# Subreddit subscribers
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#DATA_SOURCE = "https://www.reddit.com/r/circuitpython/about.json"
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#DATA_LOCATION = ["data", "subscribers"]
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# Hackaday Skulls (likes), requires an API key
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#DATA_SOURCE = "https://api.hackaday.io/v1/projects/1340?api_key="+secrets['hackaday_token']
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#DATA_LOCATION = ["skulls"]
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# Twitter followers
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#DATA_SOURCE = "https://cdn.syndication.twimg.com/widgets/followbutton/info.json?" + \
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#"screen_names=adafruit"
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#DATA_LOCATION = [0, "followers_count"]
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# on metro_m4
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#uart = busio.UART(board.TX, board.RX, timeout=0.1)
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#resetpin = DigitalInOut(board.D5)
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#rtspin = DigitalInOut(board.D6)
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# With a Particle Argon
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RX = board.ESP_TX
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TX = board.ESP_RX
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resetpin = DigitalInOut(board.ESP_WIFI_EN)
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rtspin = DigitalInOut(board.ESP_CTS)
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uart = busio.UART(TX, RX, timeout=0.1)
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esp_boot = DigitalInOut(board.ESP_BOOT_MODE)
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esp_boot.direction = Direction.OUTPUT
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esp_boot.value = True
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# Create the connection to the co-processor and reset
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esp = adafruit_espatcontrol.ESP_ATcontrol(uart, 115200, run_baudrate=921600,
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reset_pin=resetpin,
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rts_pin=rtspin, debug=False)
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esp.hard_reset()
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requests.set_socket(socket, esp)
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# Create the I2C interface.
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i2c = busio.I2C(board.SCL, board.SDA)
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# Attach a 7 segment display and display -'s so we know its not live yet
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display = segments.Seg7x4(i2c)
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display.print('----')
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# neopixels
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if NEOPIXELS_ON_CHANGE:
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pixels = neopixel.NeoPixel(board.A1, 16, brightness=0.4, pixel_order=(1, 0, 2, 3))
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pixels.fill(0)
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# music!
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if PLAY_SOUND_ON_CHANGE:
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import audioio
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wave_file = open("coin.wav", "rb")
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wave = audioio.WaveFile(wave_file)
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# we'll save the value in question
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last_value = value = None
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the_time = None
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times = 0
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def chime_light():
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"""Light up LEDs and play a tune"""
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if NEOPIXELS_ON_CHANGE:
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for i in range(0, 100, 10):
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pixels.fill((i, i, i))
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if PLAY_SOUND_ON_CHANGE:
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with audioio.AudioOut(board.A0) as audio:
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audio.play(wave)
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while audio.playing:
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pass
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if NEOPIXELS_ON_CHANGE:
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for i in range(100, 0, -10):
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pixels.fill((i, i, i))
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pixels.fill(0)
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while True:
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try:
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while not esp.is_connected:
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# secrets dictionary must contain 'ssid' and 'password' at a minimum
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esp.connect(secrets)
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the_time = esp.sntp_time
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# great, lets get the data
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print("Retrieving data source...", end='')
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r = requests.get(DATA_SOURCE)
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print("Reply is OK!")
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except (ValueError, RuntimeError, adafruit_espatcontrol.OKError) as e:
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print("Failed to get data, retrying\n", e)
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continue
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#print('-'*40,)
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#print("Headers: ", r.headers)
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#print("Text:", r.text)
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#print('-'*40)
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value = r.json()
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for x in DATA_LOCATION:
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value = value[x]
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if not value:
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continue
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print(times, the_time, "value:", value)
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display.print(int(value))
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if last_value != value:
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chime_light() # animate the neopixels
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last_value = value
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times += 1
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# normally we wouldn't have to do this, but we get bad fragments
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r = value = None
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gc.collect()
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print(gc.mem_free()) # pylint: disable=no-member
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time.sleep(TIME_BETWEEN_QUERY)
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